Physics
Scientific paper
Dec 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agufm.p21b0149r&link_type=abstract
American Geophysical Union, Fall Meeting 2005, abstract #P21B-0149
Physics
1217 Time Variable Gravity (7223, 7230), 1221 Lunar And Planetary Geodesy And Gravity (5417, 5450, 5714, 5744, 6019, 6250), 1240 Satellite Geodesy: Results (6929, 7215, 7230, 7240), 5417 Gravitational Fields (1221), 6225 Mars
Scientific paper
The MEX orbit is quite different from the MGS orbit (ellipticity of 0.6 against 0.01), and thus offers a unique opportunity to improve solutions of the time-variable gravity field of Mars (mainly) obtained from MGS orbiter tracking data. By using almost 2 years of MaRS radio tracking of MEX, an accurate MEX orbit is estimated and solutions for time variable zonal coefficients (J2 to J5) are presented. Then the MEX tracking data are also stacked with the MGS data to obtain new solutions of J2 to J5 variations. This new solution is compared with estimates from Global Circulation Model and from data of the HEND experiment onboard Mars Odyssey.
Balmino Georges
Dehant Véronique
Duron J.
Haeusler Bernd
Hoolst Tim Van
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